Draw-bench.



No. 715,863. Patentedjen.. I6, |902.

` E. E. GUIMBY, Decd.

w. E. uumsv s. c. `1. MILLS, executors. DRAW BENCH.

(Application led July 14, 1902.)

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UNITED STATES PATENT OEEICE.

WILLIAM E. QUIMBY, OF NEW YORK, N. Y., AND CHARLES J. MILLS, OF

ORANGE, NEW JERSEY, EXECUTORS OF EDWARD E. QUIMBY, DE- CEASED, ASSIGNORS TO THE NATIONAL TUBE COMPANY, A CORPO- RATION OF NEW JERSEY.

DRAW-BENCH.

SPECIFICATION forming part of Letters Patent No. 715,863, dated December 16, 1902- Application led July 14, 1902. Serial No. 115,595. (No model.)

T0 all whom, t petty concern,.-

Be it known that EDWARD E. QUIMBY, deceased, late a citizen of the United States, residing at Orange, in the county of Essex and State of New Jersey, invented a new and useful Improvement in Draw-Benches, of which the following is a specification.

The invention relates to draw-benches, and more particularly to draw-benches for forming butt-weld tubing from hot plates; and its object is to overcome the shock which occurs when the front end of the tube-blank rst strikes the welding-bell, thus overcoming the liability of the tongs losing their grip on said blank and making a higher drawing speed possible. l

In the manufacture of butt-weld tubing the tube-blank, generally in the form of a flat plate, is charged into the heating-furnace and remains therein until its edges are at a good welding heat. Its forward end is then seized by means of suitable tongs, a welding-bell is slipped over the reins of the tongs, and the latter is then connected to the drawing mechansm, generally a continuously running chain, by means of which the blank is drawn out of the furnace and through the bell, wherein it is bent into tubular form and its edges butt-welded together. When the forward end of the blank, and especiallyT when it is a flat plate, first strikes the welding-bell, there is a considerable shock, which is liable to pull the tongs off the blank or pull out a piece of the blank. By reason of this shock the speed at which the drawing mechanism can be run is necessarily limited, as the higher the speed the greater the liability of the tongs pulling off the blank.

The object of the present invention is to provide a construction of draw-bench whereby the shock produced when the forward end of the blank rst strikes the bell is largely reduced, thus reducing the liability of the tongs releasing their hold on the blank and making a higher drawing speed possible.

To this end the invention consists in providing a yielding head or holder for the bell or die which when the forward end of the blank first strikes the bell will move slightly with the traveling blank, thus reducing the shock, with its attendant harmful results.

In the accompanying drawings, Figure lis a side view of the forward end of a common type of draw-bench, showing the invention applied thereto. Fig. 2 is a plan view of a portion thereof, on an enlarged scale. Fig. 3 is a cross-section on the line 3 3, Fig. 2. Fig. 4 isacross-section on the line 44, Fig. 2. Fig. 5 is a side view of the forward end of the bench, on an enlarged scale. Fig. 6 is a plan view, and Fig. 7 a side view, of a modification.

The ordinary draw-bench used in themanufacture of butt-weld tubing is provided with a continuously-running chain and with a bell or die holder at its forward end, and as the invention can be as well explained in connection with such a draw-bench the latter has been chosen as a suitable means for illustrating the invention. In the drawings the welding-furnace is shown in section at l, and the tube-blank in the form of a Hat plate is shown at 2.

3 is a draw bench of an ordinary type mounted on rollers, as shown, so as to be movable in front of the furnace and being provided with the continuously-running drawchain 4. A

5 indicates the tongs, which maybe of any suitable construction, and 6 illustrates the usual hook or monkey for connecting the tongs to the draw-chain. In place of the draw chain, however, any other suitable traveling or reciprocating pulling mechanism may be used, and instead of the'` tongs and hook or monkey 6 any suitable means for connecting the blank to the drawing mechanism may be used.

` At theforward end of the draw-bench is a head 8, provided with seats 9 for receiving the usual holder for the bell l0. This head and 5, the said head is provided with flanges or projections l1, which extend into undercut grooves 12, formed in a casting 13, se-

cured to the forward end of the bench. In Figs. 6 and 7 the head 8 is of considerably larger size and is guided and held in place by means of bolts 14, extending through slots 15, formed in said head. In either case, however, the said head can move with the blank, and suitable yielding mechanism will be provided for permitting movement of the head when the forward end of the blank first strikes the bell and for returning the head to its forward position after the blank has passed therethrough. Various mechanism for this purpose will suggest themselves, and in the drawings springs have been illustrated as a suitable means foraccomplishing the desired result. In Figs. 1 to 5 suitable guide-rods 17 are connected to the head S, one on either side thereof, which guide-rods extend at their rear ends through perforated standards or lugs 18, preferably formed integral with the casting 13. Between these lugs or standards 1S and the head 8 are placed strong spiral springs 19, which surround the guide-rods 17 and are made suciently strong to normally hold the head 8 at its forward position, but not so strong as to prevent the said head from moving with the blank when the latter first strikes the bell. In Figs. 6 and 7 a single curved plate-spring 19 is shown, this spring being placed between the rear edge of the head S and a shoulder 2l, formed on the draw-bench. As shown in the drawings, the spring will preferably be provided with the convex projection 22, fitting in a concave seat in the head 8; but this is not essential, as the position of the spring might be reversed. Angle-brackets 23 are provided for holding the spring in place.

In the use of the apparatus described the plate will be charged into the furnace in the usual way and when its edges are raised to `a welding heat will be grasped by the tongs and connected to the draw-chain in the usual way. I'Vhen the forward end of the blank rst strikes the welding-bell, the impact will cause the head S to compress the spring or springs and move with the blank, thus greatly reducing the shock and overcoming the liability of the tongs releasing their hold on the blank and also making a higher drawing speed possible, thus increasing the output of the furnace.

In lieu of the springs shown for holding the die-holder other yielding means may be employed, such as a lever and Weight or a cylinder containing a com pressible fluid. Neither is the particular location of the springs shown in the drawings essential, as they may be located underneath the bench and connected to the holder by suitable levers or similar mechanism.

What is claimed is the following:

1. In a draw-bench, theA combination with the pulling mechanism, of the drawing-die, and a yielding holder for said die.

2. In a draw-bench, the combination with the drawing mechanism, of a die-holder movably mounted on said bench, and yielding means interposed between said holder and a stationary part of the bench.

3. In a draw-bench, the combination with the pulling mechanism, of a die-holder movably mounted on the bench, and a spring or springs interposed between said holder and a stationary part of the bench.

i. In a draw-bench, the combination with the pulling mechanism, of guides formed on the forward end of the bench, a die-holder movably mounted on said guides, and yielding means interposed between the die-holder and a stationary part of the bench.

5. In a draw-bench, the combination with the pulling mechanism, of a die-holder movably mounted on the bench, guide-rods connected to said die-holder, perforated lugs on the bench through which said guide-rods pass, and springs surrounding said guide-rods between said lugs and the die-holder.

In testimony whereof we, WILLIAM E. QUIMBY and CHARLES J. MILLS, executors of the late EDWARD E. QUIMBY, have signed our names to this specification in the presence of two witnesses.

' W. E. QUIMBY.

OHAS. J. MILLS. Witnesses:

EDWARD J. Voss, EDW. F. STEVENS. 

